#1B2E78#1B2E78

#1B2E78 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.6% C 0.129 H 267.8°. Best body text is #FFFFFF at 12.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B2E78
RGB	rgb(27, 46, 120)
HSL	hsl(228, 63%, 29%)
HSV	hsv(228, 78%, 47%)
CMYK	cmyk(77.5%, 61.7%, 0%, 52.9%)
CIE-LAB	lab(22.10, 20.83, -44.48)
CIE-LCH	lch(22.10, 49.11, 295.10°)
OKLab	oklab(33.64% -0.005 -0.1284)
OKLCH	oklch(33.64% 0.129 267.8)
XYZ	xyz(4.8180, 3.5425, 18.1955)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2E78 #78651B

analogous

#1B5D78 #1B2E78 #371B78

triadic

#1B2E78 #781B2E #2E781B

tetradic

#1B2E78 #781B5D #78651B #1B7837

square

#1B2E78 #781B5D #78651B #1B7837

split-complementary

#1B2E78 #78371B #5D781B

monochromatic

#060A19 #101B46 #1B2E78 #2641AA #3B5AD3

Accessibility & contrast

On white

12.29

#1B2E78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B2E78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2E78

12.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2E78	#FFFFFF	#000000	##FFFFFF
##1B2E78	1.00	12.29	1.71	12.29
#FFFFFF	12.29	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397A

Deuteranopia (green-blind)

#003177

Tritanopia (blue-blind)

#00414E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2e78;
/* rgb */ color: rgb(27, 46, 120);
/* oklch */ color: oklch(33.6% 0.129 267.8);

Tailwind

colors: {
  custom: {
    50: '#6766a0',
    500: '#1b2e78',
    950: '#000000',
  },
}

SCSS

$custom: #1b2e78;
$custom-light: #6766a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2e78",
  "rgb": {
    "r": 27,
    "g": 46,
    "b": 120
  },
  "hsl": {
    "h": 227.742,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33635,
    "c": 0.12851,
    "h": 267.8
  },
  "luminance": 0.03543
}

Semantic roles & 50–950 ramp

primary

#1B2E78

secondary

#AC9743

accent

#C541E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #1B2E78

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →